rthompsonpuy
rthompsonpuy t1_je3txeh wrote
Reply to ELI5: How do hotel door electronic locks know your card is valid vs. cancelled if they're not talking to the front desk all the time? by kepler1
Because when you scan the card, the reader “asks” a server for verification. It’s usually quick because it’s just the door ID and card ID, and the response either “yes” or “not yes”. (A non answer is the same as a no, that’s why sometimes you have to do it twice.)
rthompsonpuy t1_je3u1jd wrote
Reply to ELI5 Why are Humans the only species that have developed sentience/self awareness on earth? by corkscream
Why would you assume that is a statement of fact?